Electric searing-pen



(No Model.)

H. GREEN. ELECTRIC SHARING PEN.

Patented Jen. 11,1898.

Inventor.' Haw/2y feen WL tnessqs;

UNITED STATES PATENT OEEICE.

HENRY GREEN, OE HARTFORD, CGNNECTICUT.

ELECTRlC SEARlNG- PEN.

SPECIFICATION forming part of Letters Patent No. 597,373, dated January11, 1898.

Application filed April 16, 1897. Serial No. 632,431. (No model.)

To all whom it may concern:

Beit known that I, HENRY GREEN, a citizen of the United States, residingin Hartford, in the county of Hartford and State of Connecticut, haveinvented certain new and useful Improvements in Electric Searing-Pens,ofwhich the following is a specification.

This invention relates to Writing implements, it being in the nature ofan improvement upon the searing-pen covered by mycontemporaneously-pending application, Serial No. 629,328, filed March2G, 1897, the main object being to provide a simple and durable deviceof this kind which can be readily connected with an incandescent light,storage battery, or similar circuit to furnish the necessary current forheating the pen or marker to a sufficient temperature to burn or searcharacters in paper or analogous material, so that such characterscannot be erased or obliterated.

My improved Writing implement comprises a handle or stock, a resistancemedium, a searing pen or marker in contact with or embedded in theresistance medium, and electric conductors connected, respectively, Withsaid resistance medium and pen, whereby the resistance medium can bebrought to a temperature sufficient to heat by radiation the.

pen or marker, and these several parts may be of any suitable kind orconstruction.

' In the drawings accompanying and forming part of this specificationand illustrating the preferred form of my device, Figure l is aperspective view thereof, showing the manner of using the same and itsconnection With an incandescent-light circuit. Eig. 2 is a sideelevation. Fig. 3 is a longitudinal central section, and Fig. i is anend view of said device.

Similar characters designate like parts in all the iigures of thedrawings,

The handle of my improved device may be of any convenient shape whichcan be easily held and Will preferably be made entirely ofnon-conducting material-such, for instance, as slate, hard rubber, orany of the Wellknown non-conducting materials or compositions.

The handle is designated by H, and it consists in the present case of atube, the bore of Which is indicated by 2 and through which the electricconductors that supply the current to the pen or marker can pass, thecurrent,however, first traversinga resistance medium of some highlyrefractory substancesuch, for example, as comminuted carbonwith whichthe searing pen or marker is in Contact.

The resistance medium of the implement preferably consists of carbon orits equivalent, Which may be in any form suitable for the purpose, itbeing represented in a comminuted or pulverized condition. Said carbonresistance is designated by R, and it is disposed or packed in asuitable shell or cap, such as 3, of suitable material, said shell orcap having along its inner end the annular iiange 4L, which bearsagainst the disk 5 of insulating material. The inside face of theinsulating packing or disk 5, which is disposed betWeen the cap 3 andhandle H, preferably fits tightly against the ilat face of the shoulder(3 on the end of the handle H, and it maybe made of any suitablenon-conducting material-such as asbestos, mica, or slate, thedist-mentioned composition being preferable, as it prevents the heatgenerated or given out by the carbon resistance R from affecting thehandle H.

The searing pen or marker may be of any suitable construction or form,it being represented herein as an elongated pin, preferably of iron,rounded or tapered, as at 7, at its Working end to form a Writing-pointand being cylindrical in shape.

The pen or marker P passes entirely through the carbon resistance R, sothat it can be quickly heated by radiation therefrom, and at its innerend projects through an aperture 8 in the packing or insulating disk 5and also through a hub or projection 9, formed on the inside face of thedisk and which is frictionally held Within the bore 2 of the handle H.The opposite end of the pen extends through the insulated plug 10, whichis held in the reduced end 12 of the cap or shell The pen P isfrictionally held in the disk and plug, respectively, so that it can beeasily removed for any purpose, such as for the substitution of a pen ormarker of different shape than that shown.

While the disk 5, the pen P, and the plug 10 have been described asrespectively fricn IOO tionally held in place, whereby the cap or shellR can be retained in proper position against the disk or packing it isevident that some other means could readily be substituted for thispurpose without departing from the spirit of the invention.

The carbon resistance R and .the pen or marker P are connected with asuitable source of electric generation-such, for example, as an ordinaryincandescent-light circuit, as shown, or to a secondary battery-so thatwhen the current enters the carbon it promptly heats the same, the penor marker being heated by radiation 'from or contact with the carbon,and to such a temperature that it can ineilaceably or indelibly mark orimprint a suitable character or symbol on paper or similar material.

My improved writing implement is particularly adapted for commercial andbank use in drawing checks or drafts and other negotiable instruments orfor lilling in numbers therein which cannot be raised or altered.

The conductors in the present case for conveying the current to thecarbon and to the pen for heating these parts consist of the wires lVand XV', which are insulated for the greater part of their length toprotect the hand of the user and which pass through the bore 2, and thewire XV is inserted in an aperture 13 in the butt of the pen P, theother wire passing through an aperture7 as la, in the insulated disk 5and being in contact with the annular flange et on the carbon-retainingshell or cap For the purpose of modifying' or weakening the current tosuch an extent as to preclude the pen or marker l from unduly scorchingthe paper l interpose in the circuit a resistance ot some suitable kind,such as the lament F of the ordinary incandescent lamp L, said filamentso tempering the current before it reaches the carbon resistance R as toaccomplish the object sought.

The incandescent lamp L is suspended from the usual plug l5, attached tothe ceiling C, the wires leading from the plug to the lamp beingdesignated by c and c', the two wires XV and iV respectively forming abranch of the leading-in wire c and being intersected or bridged by asuitable circuit-controller or switch, as l, which may be et ordinaryconstruction and which is located in the electric circuit between thelamp and the pen. The lamp L is furnished with the usual switch S.

To use the writing device, the switch S will be manipulated to turn thecurrent into the lamp L, and the circuit-controller switch l will thenbe operated to cause the current to flow into the conductors or wires lVand .V/ and from thence tothe resistance R and pen l), therebyestablishing the circuit to heat the pen. The holder l-l will be held inthe manner usual with ordinary handwriting applianees, and the finger ofthe user can be applied to the shoulder G to obtain a better purchase onthe handle, whereby when the pen is placed in contact with paper oranalogous material, such as P, the paper can be indelibly marked withsuitable characters by searing the same.

Having described my invention, l claiml. A writingimplementcomprehending a handle; a cap; a resistance medium incased by the cap;and a searing-pen embedded in the resistance medium and passing throughone end of the cap, said searing-pen being insulated from the cap.

2. A writing implement comprehending a handle; a cap; a resistancemedium incased by the cap and consisting of comminuted or powderedcarbon; and a searing-pen embedded in the resistance medium and passingthrough one end ot' the cap, said pen being insulated from said cap.

3. A writing implement comprehending a handle; a cap; a resistancemedium incased in the cap and insulated troni the handle; and asearing-pen insulated, respectively, from the handle and cap.

A writing implement comprisinga handle; a cap; a resistance medium insaid cap; packing of insulating material between the cap and handle; aplug of insulating material in said cap; a searing-pen passing throughapertures in said plug and packing; and electric conductors connected,respectively, with the pen and cap.

5. A writing implementcomprising a handle, a cap; a resistance medium insaid cap; packing of insulating material between the cap and handle, aplug of insulating material in said cap; a searing-pen passing throughapertures in the plug and packing and frictionally held therein; andelectric conductors connected, respectively,with the pen and cap.

G. A writing implement comprising a handle; a cap; a resistance mediumin said cap; a disk between the cap and handle, having a teat seated ina bore in said handle; a plug of insulating material in said cap;asearingpen passing through said plug and disk; and electric conductorsconnected, respectively, with the pen and cap.

7. A writing implement comprising a handle; a cap having a flange;comminuted carbon disposed in said cap; a disk located between theflange and the handle, said disk of insulating material having a teatextending into a bore in said handle; a plug of insulating materialseated in the cap; a searing-pen having a tapered or sharpened writingend, said pen being passed through apertures in the plug and disk; andelectric conductors connected, respectively, with the pen and cap.

HENRY GREEN.

-Witnesses:

Wn. ll. BLonen'r'r, HEATH SUTHERLAND.

ICO

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